Senior Power Electronics Engineer

YPlasma is a deep tech spin off from INTA, Spain's national aerospace agency. We build solid state, fanless cooling based on Dielectric Barrier Discharge (DBD) plasma actuators: flexible films, roughly 200 microns thick, that move air silently and on demand using ionic wind, at a fraction of the energy a conventional fan needs and with zero moving parts.

Our wedge market is thermal management for Edge AI. The heat envelope of next generation NPUs and SoCs has outgrown what mechanical fans can deliver inside the laptops, AI PCs, robots, and inference appliances that OEMs want to ship. We are already running joint development programs with Tier 1 silicon vendors and global OEMs, backed by a granted core patent, a decade of transferred process know how, and roughly 4.5M EUR raised to date. We are now closing a pre Series A to industrialize the product and win our first commercial designs.

The actuator only cools when you feed it the right high voltage waveform. That power stage is the heart of the product, and we are hiring a Senior Power Electronics Engineer to own it.

You will own the design of the high voltage converter that drives our actuators: a compact, efficient, electrically quiet power stage that turns a low voltage DC input into a controllable kilovolt range, kHz frequency AC drive. Today this drive electronics sits at the center of every customer conversation and every reliability question we need to answer to ship. You will take it from working prototype to a qualified, manufacturable product that integrates into customer hardware.

This is a senior individual contributor role reporting to the CTO and working side by side with our applications and plasma research engineers. You will have real ownership of architecture and design decisions, and your work will move directly onto customer platforms.

• Architect, design, and prototype high voltage AC drive converters for DBD actuators, from a few kV up to tens of kV peak to peak at kHz frequencies, optimizing for efficiency, size, and electrical noise.
• Evaluate and select converter topologies (resonant, flyback, push pull, switched capacitor) and drive the trade studies behind those choices.
• Design the magnetics, including high voltage and high frequency transformers and integrated magnetic structures, and the associated switching stages.
• Bring down size and weight so the converter fits the submillimeter, weight sensitive form factors of Edge AI devices, while holding efficiency.
• Own EMI and EMC performance by design: active filtering, layout, shielding, and grounding strategy, with a clear path to FCC, CE, and customer specific compliance.
• Plan and run reliability and qualification work (HALT, HASS, thermal, high voltage insulation and lifetime) and close the loop back into the design.
• Build the test benches, instrumentation, and characterization methods needed to measure high voltage behavior safely and repeatably.
• Support customer and OEM design in: translate the power stage into reference designs, answer thermal and electrical integration questions, and adapt the drive to customer hardware.
• Drive industrialization and transfer of the converter to our microelectronics manufacturing partner, including design for manufacturing, documentation, and bring up support.
• Contribute to our IP position through invention disclosures on drive electronics and integration patterns.

• 5 plus years designing switch mode power electronics through the full cycle, from concept and simulation to working, validated hardware.
• Strong command of converter topologies, magnetics design, and closed loop control of power stages.
• Hands on high voltage experience, or clear adjacent experience and the appetite to go deep on kV class design, insulation, creepage and clearance, and safety.
• Practical EMI and EMC skills: you have taken products through compliance, or debugged your way to it, not just read the standards.
• Fluency with the bench: oscilloscopes, high voltage probes, power analyzers, and the discipline to work safely around high voltage.
• Comfort with simulation tools (SPICE class circuit simulation; magnetics or FEA tools a plus) and with reading your own PCB layouts critically.
• A product mindset: you care about size, cost, manufacturability, and reliability, not only the lab result.
• Degree in Electrical or Electronic Engineering, or equivalent practical depth.
• Working English. Spanish is helpful but not required.

• High voltage AC, plasma, electrostatics, X ray, ozone, or similar kV class applications.
• Magnetics design for high frequency, high voltage transformers.
• Experience taking hardware through OEM qualification, especially consumer electronics, automotive, or aerospace.
• Design for manufacturing and transfer to a contract manufacturer or microelectronics partner.
• Firmware or digital control for power converters (gate timing, waveform shaping, protection).

• Own a core technology. The power stage is not a supporting component here; it is one of the two things that make the company work. Your design ships in the product.
• Real impact, early. We are small, funded, and past the science risk (TRL 5 with qualification work in flight). What stands between us and revenue is engineering you will lead.
• Hard, novel problems. Compact, efficient, quiet kilovolt class drive is genuinely difficult and rarely done well. You will not be maintaining someone else's reference design.
• Serious backing and IP. Spin off from INTA, granted core patent, Tier 1 manufacturing partners in motion, and an experienced founding team that has scaled and exited deep tech before.
• Competitive salary and meaningful equity in an early stage company.
• Hybrid working from our Madrid HQ, alongside the lab where the actuators are built and tested.

• Location: Madrid, Spain or Newark, NJ.
• Type: Full time, permanent.
• Eligibility: You must have, or be able to obtain, the right to work in Spain or the US.

Send your CV and a short note on a high voltage or power converter you took from idea to working hardware to [ [email protected] ] . Links to designs, papers, or teardowns welcome.

YPlasma is an equal opportunity employer. We hire on the merits of the person and the work, and we welcome applicants of every background.